Thin-place detector for looms.



JNO. 895,591. PATENTED AUG. 1l, 1908.

` W. J. STLWAR'I.

THIN PLAGE DETECTOR FOR LOOMS.

APPLICATION FILED JAN.22, 1906.

2 SHEETS-SHEET 1.

11d/eases www No. 895,591. PATENTED lAUG. l1, 1908.

W. J.' STEWART. THIN PLAGE DETECTOR FOR LOOMS.

APPLICATION FILED .TAN.2Z, 1906.

2 SHEETS-SHEET 2.

l WILLIAM JWSTEWART, OF WEBSTER, MASSACHUSETTS.

THIN-PLACE DETECTOR FOR 11.00115.4

Specification of Letters Patent.

Patented Aug. 1 1, 190s.

Application led January 22, 1 906. Serial No. 291,181.

' Webster, in 'the county of Worcester and State of Massachusetts, have invented a new and useful Thin-Place Detector for Looms, of which the following is a specification.

In looms, particularly that class of automatic looms wherein the mechanism is arranged to provide a continuous supply of iilling by automatically changing the shuttles or the bobbinsin the shuttles, it frequently happens that owing to derangement in the weft supplying mechanism, the loom will. make a number of beats without any weft or filling being supplied. This will -leave a thin place in the cloth which will cause imperfections and loss. This objection is especially found in the class of automatic looms, as each operator has yto tend a large number of looms and very often these thin places will occur and the loom again get into proper operation so that the thin place will escape detection. To overcome this difficulty, I have provided a new and improved form of detector which is arranged to operate b electricity to'stop the loom in case of fai ure of the iilling supply. By providing electric controlling means to accomplish this pur ose, l have found in practice that avery e cient device can be provided. The invention in the best form now known to me for utting the same into practice is shown in t e two sheets of drawings forming part of this application in which, y

Figure 1 is a side elevation of enough of Vthe parts of a loom to illustrate my invention. Fig. 2 is a plan view of part of the mechanism on an enlarged scale. Fig. 3 is a side elevationof the feeler. Fig. 4 is a sectional elevation of the throw-out. FiO. 5 is a rear elevation of the throw-out, and ig. 6 is a detail view of the switch controlled by the starting handle of the throw-out.

The improved detector comprises a feeler which bearson the cloth so that it will change its osition in case of derangement in the sup ly of the filling, a throw-out for stopping t e mechanism, an electro magnet or armature attached to control the action of the throw-out, and an electric circuit to the mechanism which is connected to be opened and closed by the feeler. A switch is also controlled by the starting handle of the throw-out so that the electric circuit is only completed when the loom is in operation, thereb preventing short circuiting and waste o `electricity.

The invention further consists of certain improved details of construction hereinafte pointed out and described.

Referring to the drawings and in detail, A designates the frame, L the vibrating lathe, and B the breast-beam of the loom.

T designates the loom temple which is connected to the framing and arranged at the side of the loom in the ordinary way.

A bracket 10 is secured to the loom frame and projecting from the same is a hub 11 ofk to strike on the projecting screw 13 of the loom tem le.

When t e filling is properly supplied, the cloth will .hold the feeler up, as shown in full lines in Fig. 3, but when the sup ly of filling is deranged, the point of the fee er will drop down into the cloth between the warp threads and the feeler will rest on the screw 13 making an electric contact between the- A spring or other device is arranged in the ordinary -way so that the normal tendency of the controlling handle 14 will be to shift to the left, as shown in Fig. 5, so as to throw the loom out of. operation.

` A throw-out device is arranged to control the operating handle 14. This throw-out de# f vice consists of a lever 2 which is pivoted to 23 is arranged on the lathe of the loom.

the loom frame a`t21. A dog22 is pivoted on the lower end of this lever 20. A bun'elrl' electro magnet 24 is secured ina box fastened on the inside of the frame, asshown.

An armature 25 is pivoted in this box so as tobe actuated by said magnet.

The armature is connected by a'link 26vto the pivoted dog 22. The parts are shown in normal position in Fig. 1, in which position the pivoted dog 22 comes below the bunter 23 on the lathe so that the bunter will clear said dog as the lathe beats un the filling. An arm 27 is pivoted on a stud 28 in the lower part of the loom frame. The top face of the arm is inclined, as shown, and is provided with a slot. The-controlling handle 14 is extended down below this pivot l5, as at 14@ and this extension 140 lits in said slot 29. 30 designates one leading-in wire of the electric circuit.

From the electro magnet a wire 31 is lead to a spring 32 mounted on a board 33 which is" made out of insulating material. These parts are arran ed in position sothat when the controlling andle 14 is moved to the position shown 1n Fig. 5 to put the loom into operation, the lower end 140 thereof will move outwardly in the slot 29 of the arm 27 and will slightly throw the arm 27 to 'the rear of the loom and into contact with the spring 32. This will connect the leading-in wire 30 electrically to the loom frame. Another leading-in wire 34 is connected to the feeler 12. The wires 30 and 34.' are connected to a suitable source of electric energy.

In operation, when the loom is thrown int/o operation, the wire 30 will be electrically connected-tc the loom frame, as previously is proper filling in the cloth, the feeler will be kept out of contact with the screw 13.n When there is a derangement in the supply of the filling, the feeler will drop down into the cloth and vwill come in contact with the screw 13. This Lwill complete the circuit and will energize the Y electro magnet 24. This will pull down the after the loom armature 25 and will move the pivoted dog 22 so that on the next beat of the lathe, the throw-out lever 20 be rockedl and the controlling handle 1e will be moved out of its notch 19 thereby allowing the same to s ring to the left, as shown in Fig. 5, and t us stop the' loom. l

When the loom is stopped, the arm 27, which thus practically performs an electric Switch, will be moved out of contact with the spring 32. This will break the electric circuit and will pevent a waste of electricity as been thrown out of operation, and also will prevent short circuiting when the loom is not in operation.

throw-out for stopping the loom,

sensei IBy the mechanism thus described, a simple and eicient apparatus for the purposes stated is provided.

Having thus fully described my invention,

what I claim and desire to secure by Letters- 1. AA thin place detector for loomsl come prising a feeler bearing on the cloth so as to change its position in case of-derangement of filling, a controlling handle for the loom, a an electro magnet and armature adapted to control the action-of the throw-out, an electric circuit connected to the magnet and to be opened and closedby the feeler, a switch, and means controlled by the operation oi the starting handle for operating said switch.

2. The combination of a loom, a ieeler arranged thereon so as to engage the loom temple and normally held out, of engagement therewith by the 'filling in the cloth, a throwout for stopping the loom, an electro magnet and armature attached to control the action of the throw-out7 and an electric circuit connected to the magnet to be closed and opened by the ieeler engaging and disengaging the loom temple.

3. The combination with a loom having a temple, of a feeler adapted to engage the temple and arranged to be held out of engagement therewith bythe cloth, and electric connections for stopping the loom when the ieeler engages the temple.

,4. A thin place detector for'looms, com prising a feeler adapted to bear on the cloth andto change its position in case of derangement of the filling, an electric circuit ada ted to be closed by the falling of the fee er, means connected with said circuit for stopping switch in said circuit and means controlled by the stopping of the loom for turning said switch to again open the circuit.

5. A thin place detector for looms, comprising a feeler adapted to bear on the cloth and to change its position in case of derangement of the filling, an electric circuit ada ted to be closed by the falling of the fee er, means connected with said circuit for stopping the loom when the circuit is closed, and a switch in saidcircuit adapted to be turned by the stopping of the loom to again open the `armature attached to control the action of the loom when the circuit is'closed, a

the throw-out, an electric circuit connected :L25

to the magnet and tobe opened and closed by the feeler, and a switch in said circuit the action of the throw-out, and an electric comprisin a pivoted' arm havin a cam slot circuit connected to the magnet to be opened with whc the controlling hand e engages. and closed by the feeler.

7. A thin -place detector for looms com- In testimon whereof I have hereunto set 5 rising an insulated bearing carried by the my hand, in t e presence of two subscribing 15 oom, a feeler pivoted on the insulated been witnesses.

mg and bearing on the cloth so as to change WILLIAM J. STEWART. its position in case of derangement of filling, Witnesses: a throw-out for stopping the loom, an electro C. F. WESSON,

10 magnet and armature attached to control MARY E. REGAN. 

